The snake charmers aren't evangelical. They are a fundie branch though. One of the holiness varieties of batshit. Coupla decades back, one of the preachers was convicted of murdering his wife with a rattlesnake in the middle of service. There was a book written about it, Salvation on Sand Mountain.

All that happened down in the Buck's Pocket area, just outside of what's now the Guntersville State Park down in Alabama.